If you’re a hobbyist, you probably already own a Dremel rotary tool. In FPV, the most common use is cutting off screws, cutting slots in stripped screws, and drilling and grinding carbon fiber plates. All of which is to say, it’s not absolutely essential, but if you get one, it’ll make your life easier, and there will be a million other uses for it around the house.
The 8220 has a built-in rechargeable battery, so there’s no cord to get in your way. The speed is adjustable from 5000 rpm to 30,000 rpm, which means you can do slow-rpm drilling and high-rpm cutting with the same tool. The on-off switch is separate from the rpm slider, so you won’t reset the speed when you take a break. It’s compatible with all Dremel accessories.
Find this product at these vendors: